hey all,
I was wondering why the following didn't output any solutions. I'd think
it would be easy:
Solve[(999999999999/10000000000000)^x == .5, x]
It gives no solutions. What's really odd is when you say:
Solve[(999/1000)^x==.5, x]
which *does* give solutions, in the form:
{{x -> 692.801... }}
Also, just curious, but how do you extract 'x' from the above?
Say I wanted to plug the above solution into another equation..
In perl I'd say something like:
y = Solve[(999/1000)^x == .5, x];
3 * y->{x} # replaces with 692.81
etc. etc.
but this doesn't seem to work. How do you access parts of a mathematica
datastructure/hash?
And finally, how do you set values with the tty? ie: suppose my backspace and
delete key aren't working with math.exe (they aren't) and I want them to
delete typos. In unix this would be stty erase ^H. In mathematica...?
Thanks much for any help,
Ed